Minor dashboard tweaks, fix flex-list margins (#26829)
Some small dashboard tweaks:
- Remove margin-bottom from divider so first item does not appear to
have un-equal margins
- Restore previous icon color
- Add slight margin-right to icon
Before:
<img width="783" alt="Screenshot 2023-08-31 at 00 10 28"
src="https://github.com/go-gitea/gitea/assets/115237/b75f70d7-8704-4afb-866d-fea0484c52d4">
After:
<img width="783" alt="Screenshot 2023-08-31 at 00 10 08"
src="https://github.com/go-gitea/gitea/assets/115237/50ed0c47-6f7c-449e-a054-13091369d43f">
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Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
authored by